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Using a Balance

Using a Balance

TEKS Objective

The student is expected to collect, record, and analyze information using tools, including calculators, microscopes, cameras, computers, hand lenses, metric rulers, Celsius thermometers, prisms, mirrors, pan balances, triple beam balances, spring scales, graduated cylinders, beakers, hot plates, meter sticks, magnets, collecting nets, and notebooks; timing devices, including clocks and stopwatches; and materials to support observation of habitats of organisms such as terrariums and aquariums.


Essential Understanding

The student knows how to use a variety of tools, materials and methods to conduct science inquiry.

Science Background

Understanding the Basics of Balancing and Measuring Techniques: Balance Technology Inc (PDF) – Detailed explanation of the fundamental principles of balancing.

Understanding the Basics of Balancing and Measuring Techniques
Balance Technology, Inc. www.balancetechnology.com

Balance Theory: Ohaus (website) - This section of the Ohaus Triple Beam Balance site explains how mechanical balances work and discusses the physics involved when using triple beam balances.

Balance Theory
Ohaus, www.ohaus.com

Signature Lesson

Measuring Weight: Learn NC (website) - Students build their understanding of the difference between density and weight by using a triple beam balance to measure the mass of different objects, recording their outcomes and discussing the results. Includes assessment.

Measuring Weight
Learn NC, www.learnnc.org

Supporting Lessons

Triple Beam Balance Activities: My Science Lessons Blog (website) - Introduction to the use of a triple beam balance.

Triple Beam Balance Activities
My Science Lessons Blog, mysciencelessons.wordpress.com

Measuring Mass with a Triple Beam Balance: Better Lessons (website) - Investigate mass and matter including a tutorial.

Measuring Mass with a Triple Beam Balance
Better Lessons, www.betterlesson.com

Elaboration Lessons and Extensions

Exploration of a Balance: NCTM Illuminations (website) - In this series of three lessons, students us a balance to explore mass, and investigate patterns and relationships among balance, mass, length of the balance’s mass arm, and the position of the fulcrum.

Exploration of a Balance
NCTM Illuminations, illuminations.nctm.org

Everything Balances Out in the End: NCTM Illuminations (website) - Students balance shapes on an interactive pan balance to study equality. Includes follow-up questions, assessment and extensions.

Everything Balances Out in the End
NCTM Illuminations, illuminations.nctm.org

Assessment Ideas

Have students explain, in writing, the sequence to measure an object’s mass using a triple beam balance.

Practice Weighing: Ohaus Corporation (website) - This interactive activity on the Ohaus website linked below will enable students to test and sharpen their ability to read a triple beam balance.

Practice Weighing
Ohaus Corporation, www.ohaus.com

Literature Connections

Balancing Act. Stoll-Walsh, Ellen (ISBN-13: 978-1442407572)

Mobiles: Building and Experimenting with Balancing Toys. Zubrowski, Bernie (ISBN-13: 978-0688105891)

101 Circus Games for Children. Rooyackers, Paul (ISBN-13: 978-0897935166)

Related Science TEKS

(5.1A) Science Safety
The student is expected to demonstrate safe practices and the use of safety equipment as described in the Texas Safety Standards during classroom and outdoor investigations.

(5.1B) Recycling/Disposal of Science Materials
The student is expected to make informed choices in the conservation, disposal, and recycling of materials.

(5.2A) Design/Conduct Experiment with One Variable
The student is expected describe, plan, and implement simple experimental investigations testing one variable.

(5.2B) Ask Questions, Formulate a Hypothesis
The student is expected to ask well-defined questions, formulate testable hypotheses, and select and use appropriate equipment and technology.

(5.2C) Collect Data
The student is expected to collect information by detailed observations and accurate measuring.

(5.2D) Analyze Evidence and Explain
The student is expected analyze and interpret information to construct reasonable explanations from direct (observable) and indirect (inferred) evidence.

(5.2F) Communicate Conclusions
The student is expected communicate valid conclusions in both written and verbal forms.

(5.2G) Graphs, Tables, Charts
The student is expected construct appropriate simple graphs, tables, maps, and charts using technology, including computers, to organize, examine, and evaluate information.

Related Math TEKS

5.12B    The student is expected to use experimental results to make predictions.

5.14D    The student is expected to use tools such as real objects, manipulatives, and technology to solve problems.

5.15A    The student is expected to explain and record observations using objects, words, pictures, numbers, and technology.

Additional Resources

Triple Beam Balance Tutorial: Ohaus Corporation (website) - Series of interactive, online tutorials that explain set-up and care of a triple beam balance, how to use read the balance, and the scientific principles that make a balance work.

Triple Beam Balance Tutorial
Ohaus Corporation, www.ohaus.com

Metric Mania Lesson Plans: The Science Spot (website) - Links to resources and lessons on measurement, including mass activities using a balance.

Metric Mania Lesson Plans
The Science Spot, www.sciencespot.net

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